Norovirus issues seem to be prevalent only on cruise ships. Why?
Or is it that on cruise ships is the only times this virus gets reported...as the ship is a little self-contained sealed world.
‘...as the ship is a little self-contained sealed world.”
Yeah, I think that’s pretty much it. Occasionally the media will report a norovirus outbreak at a large high school or similar. While a high school isn’t quite as “sealed” as a ship at sea, it’s semi-sealed in that you might have 1,000 people in a relatively small space, not coming and going but rather in the same place for the better part of a day.
Cruise ships dump their waste into the same sea lanes they use over and over again. And that is also where they get their drinking water. It is filtered to get out the bigger chunks, and desalinized. But its filters cannot separate out viruses, which are too small, at from 23 to 40 nm in diameter.
The cruise lines are well aware of this, but refuse to spend the money to purify their water.